package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @auther Mr.wang
 * @date 2024/11/6 - 18:49
 */
@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐, 同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //向套餐表插入数据
        setmealMapper.insert(setmeal);

        //获取套餐id
        Long setmealId = setmeal.getId();
        //拿到套餐中的菜品们
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(dish -> dish.setSetmealId(setmealId));
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }


    /**
     * 批量删除套餐
     * @param ids
     */
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);
            if (StatusConstant.ENABLE == setmeal.getStatus()) {
                //判断当前套餐是否是起售状态，起售状态则不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId ->{
                //删除套餐表中的数据
                setmealMapper.deleteBySetmealId(setmealId);
                //删除套餐菜品关系表中的数据
                setmealDishMapper.deltteBySetmealId(setmealId);
        });
    }


    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {

        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);

        setmealVO.setCategoryName(setmeal.getName());
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //1、修改套餐表，执行update
        setmealMapper.update(setmeal);

        //获取套餐id
        Long setmealId = setmealDTO.getId();

        //2、删除套餐和菜品的关联关系，操作setmeal_dish表。执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealId));

        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 启用停售套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        setmealDishes.forEach(setmealDish -> {
            if (StatusConstant.DISABLE == status){
                List<Dish> dishes = dishMapper.getBySetmealId(id);
                if (dishes != null && dishes.size() > 0){
                    dishes.forEach(dish -> {
                        if (StatusConstant.DISABLE == dish.getStatus()){
                            throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                        }
                    });
                }
            }
        });

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}

















